Improvement in middlings-separators



s. s. SHAVER. Middlings-Sepatators. N 214,717.

Patented April 22, I879.

Mk A;

MPEVERS, PMOIOLITMOGRAFHER WASHING'ION UNITED STATES PATENT OFFICE.

SILAS S. SHAVER, OF MENASHA, WISCONSIN.

IMPROVEMENT IN MIDDLINGS-SEPARATORS.

Specification forming part of Letters Patent N0. 214,717, dated April22, 1879; application filed November 13, 1878.

To all whom it may concern:

Be it known that I, SILAS S. SHAVER, of the city of Menasha, Wisconsin,have invented a new and useful Improvement in Middlings- Separators, ofwhich the following is a specification.

Itis a well-known fact that the tendency of the air received into theconveyer-chamber of a middlings-separator is toward the center of thesieve or bolting-cloth. This results from two causes-the position of theopenings into the conveyer-chamber and the location of the exhaust-fanover the center of the machine.

As the machine has been heretofore constructed, the blastis too strongin the center and insuflicient at the sides to produce as goodwork aswhen the air is equally distributed underneath the entire surface of thesieve or bolting-cloth. At the center, where the current of air isstrongest, a portion of the middlings will be carried along with theoffal into the blowchamber, and at the sides, where thecurrent of air isweakest, the separating process will be incomplete, and a portion of theoflal will fall through the sieve unseparated from the middlings.

The object of my invention is to equally distribute the air in itsupward course through the sieve; and the invention consists in applyingto middlings-separators a device for equalizing the draft of air, ashereinafter described, and pointed out in the claims.

In the drawings, Figure 1 is a detached view of the air-equalizer inperspective. Fig. 2 is an end View of the lower portion of amiddlings-separator with the casing removed, showing the relativeposition of the equalizer to the bolting-cloth.

The convyer and fan, and the various devices employed to produce theseveral mechanical movements, are not shown or described, as they formno part of my invention.

A represents the frame-work of the machine, .to which is attached thecasing G, by which the operating parts of the machine are inclosed.

13 represents the location of the boltingcloth or sieve, and D Drepresent the airequalizer.

The arrows show the direction of the air in its passage into and out ofthe conveyer-chamber of the machine.

The air equalizer or distributer consists of a diaphragm or frame, D,situated immediately under the bolt, and preferably made of bolt shallreceive throughout the same quantity of air-blast in the operation ofthe separator.

In the drawings, a a are the inclined boards,

with the graduated openings 0 0.

The openings may be either at the top or bottom of the inclines of theboards forming the diaphragm. In the latter case they admit air to alarger area, and in the former case they admit air to a smaller area.

The openings may vary in width, as shown in Fig. l, or they may varyonly in their relative distances.

The boards forming the diaphragm must be either inclined, as the middleones shown in the drawings, or of an inverted-V form in cross-section,as the ones shown at the sides, for permittin g the free escape of themiddlin gs falling.

Although I have constructed my air-equalizer in the manner shown in thedrawings,'I claim that any change of form in the same that provides foran equal distribution of the air inits upward passage through the sieveto be within the scope of my invention.

What I claim, and wish to secure by Letters Patent, is-

1. In a middlings-separator having means for producing an upward draftof air through the bolt, an airdistributer consisting of a diaphragm orframe arranged immediately beneath the bolt, and provided with openingslongitudinally of the bolt for the admission of air thereto,substantially as described.

2. In a middlings-separator having means for producing an upward draftof air through the bolt, an air distributer consisting of a diaphragm orframe arranged immediately beneath the bolt, and provided withlongitudinal openings, graduated according to their location withrespect to the bolt, for the purpose of regulating the admission of airto the different parts of the bolt, substantially as set forth.

SlLAS S. SHAVER. Witnesses:

It. H. BOYNTON, G. H. CLARKE.

